<template>
  <view>
    <view class="search-box">
      <!-- 使用 uni-ui 提供的搜索组件 -->
      <uni-search-bar @input="input" :radius="100" cancelButton="none" placeholder="请输入搜索内容" :focus="true"></uni-search-bar>
    </view>
    <view class="sugg-list" v-if="searchResults.length !==0" >
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">
          {{item.goods_name}}
        </view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <view class="history-box" v-else>
      <view class="history-title">
          <text>搜索历史</text>
          <uni-icons type="trash" size="17" @click="clearHistory"></uni-icons>
        </view>
        <view class="history-list" >
            <uni-tag :text="item" v-for="(item, i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
          </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw:'',
        searchResults : [],
        historyList:[]
      }
    },
    computed:{
      histories () {
        return [...this.historyList].reverse()
      }
    },
    methods: {
      onLoad () {
        this.historyList = JSON.parse(uni.getStorageSync(('kw')|| '[]'))
      },
      input(e) {
        clearTimeout(this.timer)
        this.timer=setTimeout(()=>{
          this.kw = e
          console.log(this.kw)
          this.getSearchResults()
        },500)
      },
    async  getSearchResults () {
      if(this.kw===''){
        this.searchResults =[]
        return
      }
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        console.log('获取搜索建议',res)
        if(res.meta.status !==200) return uni.$showMsg()
        this.searchResults =res.message
        this.saveSearchHistory()
      },
      
      gotoDetail (goods_id) {
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
        })
      },
      saveSearchHistory () {
        const set =new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList= Array.from(set)
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clearHistory () {
        this.historyList=[]
        uni.removeStorage('kw')
      },
      gotoGoodsList(kw) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    }
   
  }
  
</script>

<style lang="scss">
  .search-box {
    position: sticky;
    top: 0;
    z-index: 99;
  }
.uni-searchbar {
  display: flex;
  flex-direction: row;
  position: relative;
  padding: 16px;
  background-color: #c00000 ;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
